CSS Worksheet: Hex and RGB Colours

HTML and CSS lesson 15: Colours: hex and rgb · Set 279 · 40 questions

Code tip (Red, green, blue): rgb(red, green, blue): each from 0 to 255. #rrggbb: the same three numbers in hex. Hex digits: 0–9, then a = 10, b = 11, c = 12, d = 13, e = 14, f = 15. A pair = 16 × first digit + second digit: ff = 16 × 15 + 15 = 255.

1. 1.🌈 Which colour is #0000ff? (a) magenta (b) white (c) blue (d) bright green
2. 2.🌈 Which colour is #000000? (a) blue (b) cyan (c) bright green (d) black
3. 3.🌈 Which hex code is red? (a) #ff0000 (b) #00ff00 (c) #ff00ff (d) #ffffff
4. 4.🌈 Which hex code is magenta? (a) #00ffff (b) #ffffff (c) #ff0000 (d) #ff00ff
5. 5.🌈 Which colour is rgb(0, 0, 0)? (a) cyan (b) magenta (c) white (d) black
6. 6.🌈 Which colour is #ff00ff? (a) cyan (b) white (c) black (d) magenta
7. 7.🌈 Hex digits go 0 to 9, then A to which letter? (a) J (b) G (c) Z (d) F
8. 8.🌈 In #rrggbb, which colour do the first two digits give? (a) red (b) green (c) blue (d) black
9. 9.🌈 Which colour is rgb(255, 255, 0)? (a) blue (b) black (c) white (d) yellow
10. 10.🌈 In #b50000 the red part is the hex number b5. What is it as a normal number?
11. 11.🌈 Which hex code is black? (a) #0000ff (b) #00ff00 (c) #ff0000 (d) #000000
12. 12.🌈 Which colour is rgb(255, 0, 0)? (a) black (b) white (c) bright green (d) red
13. 13.🌈 Which hex code is white? (a) #00ff00 (b) #00ffff (c) #000000 (d) #ffffff
14. 14.🌈 Which colour is rgb(0, 255, 255)? (a) red (b) magenta (c) blue (d) cyan
15. 15.🌈 In #000400 the green part is the hex number 04. What is it as a normal number?
16. 16.🌈 Which colour of light is strongest in rgb(236, 88, 51)? (a) green (b) red (c) blue
17. 17.🌈 Which hex code is yellow? (a) #00ff00 (b) #ffffff (c) #ff0000 (d) #ffff00
18. 18.🌈 Which colour is rgb(0, 255, 0)? (a) cyan (b) bright green (c) white (d) magenta
19. 19.🌈 Which colour is rgb(255, 255, 255)? (a) blue (b) white (c) red (d) black
20. 20.🌈 In #00e200 the green part is the hex number e2. What is it as a normal number?
21. 21.🌈 In #0000b8 the blue part is the hex number b8. What is it as a normal number?
22. 22.🌈 Which colour of light is strongest in rgb(211, 80, 82)? (a) blue (b) red (c) green
23. 23.🌈 In #4f0000 the red part is the hex number 4f. What is it as a normal number?
24. 24.🌈 How many pairs of hex digits are in a colour like #ff8800? (a) 3 (b) 2 (c) 4 (d) 6
25. 25.🌈 What is the biggest number one colour can have in rgb()? (a) 1000 (b) 99 (c) 100 (d) 255
26. 26.🌈 In #00e800 the green part is the hex number e8. What is it as a normal number?
27. 27.🌈 In #000070 the blue part is the hex number 70. What is it as a normal number?
28. 28.🌈 In #0000da the blue part is the hex number da. What is it as a normal number?
29. 29.🌈 Which colour of light is strongest in rgb(156, 46, 44)? (a) blue (b) green (c) red
30. 30.🌈 In #00005a the blue part is the hex number 5a. What is it as a normal number?
31. 31.🌈 In #rrggbb, which colour do the last two digits give? (a) blue (b) red (c) green (d) white
32. 32.🌈 Which colour is rgb(255, 0, 255)? (a) cyan (b) magenta (c) yellow (d) red
33. 33.🌈 In #004300 the green part is the hex number 43. What is it as a normal number?
34. 34.🌈 Which colour is #ffff00? (a) yellow (b) magenta (c) white (d) blue
35. 35.🌈 Which colour of light is strongest in rgb(197, 54, 59)? (a) green (b) blue (c) red
36. 36.🌈 In #006900 the green part is the hex number 69. What is it as a normal number?
37. 37.🌈 Which colour is #ffffff? (a) blue (b) black (c) magenta (d) white
38. 38.🌈 In #000064 the blue part is the hex number 64. What is it as a normal number?
39. 39.🌈 Which colour of light is strongest in rgb(88, 72, 223)? (a) red (b) blue (c) green
40. 40.🌈 Which colour of light is strongest in rgb(196, 96, 4)? (a) green (b) blue (c) red

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